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File No.
GR-DOSSIER-30049
Active File
Confidence: Public
Resilience Dossier

Lewis and Clark CountyMontana · MT

46
/ 100fair
Composite scale0 ─ 100
46
CriticalExcellent
State rank
#50MT
National rank
#2,637/ 3,436
Population
70,9227.9/km²
FIPS 30049│AREA 8,957 km²│LAT 47.1320 · LON -112.3734
§01

Geospatial

47.13°N, 112.37°W
Map of Lewis and Clark County, MT
Target ▸ Lewis and Clark County
N│Mapbox dark-v11
§02

Analyst Brief

Voice ▸ Stratfor

▌Lewis and Clark County is a county in Montana, with a population of 70,922, covering 8,957 square kilometers. Population density is 7.9 people per square kilometer. On the Scout composite resilience index, Lewis and Clark County scores 46 out of 100, ranked #50 in MT and #2,637 of 3,436 regions. The five-year average temperature anomaly versus the 20th-century baseline is 2.4 degrees Fahrenheit. Counties above 2.6 degrees fall inside the climate tipping-point band. The FEMA National Risk Index composite hazard score is 51 out of 100. Annual precipitation averages 22.3 inches. Net IRS migration in the most recent tax year was +8.6 per 1,000 residents. USDA classifies the county as Rural-Urban Continuum Code 3 (1 = metropolitan core, 9 = completely rural).

§03

Assessment Matrix

6 Dimensions
D-0141

Climate Stability

Natural hazard exposure, temperature anomaly vs. 20th-century baseline, drought, wildfire, and flood risk.

D-0219

Water & Food

Groundwater reliability, precipitation normals, growing season length, and cropland availability.

D-0374

Social Stability

Net migration, social vulnerability, and crime rates.

D-0463

Infrastructure

Solar energy potential, off-grid power viability, and proximity to nuclear facilities.

D-0541

Self-Sufficiency

Rural-urban classification, agricultural diversity, and land availability.

D-0655

Affordability

Median home value and rental costs relative to the national range. Lower cost counties score higher.

§04

Source Telemetry

14 Inputs
S-01Climate
FEMA NRI hazard score
51.16 /100
Temperature anomaly
2.35 °F
S-02Water
Annual precipitation
22.3 in
Soil saturation depth
2.0 ft
Growing season
88 days
S-03Social
Net migration
+8.6 /1k
Social vulnerability
0.191 /1
Crime index
7.5 /100
S-04Infrastructure
Solar irradiance
4.0 kWh/m²/d
Distance to nuclear facility
332.1 mi
S-05Self-Sufficiency
Cropland share
4.1 %
Rural-urban code
3 /9
S-06Affordability
Median home value
$332,000
Median rent
$1,006 /mo

Inputs marked “— —” are pending pipeline integration and currently use neutral defaults in the composite. They do not skew rankings.

§05

Cross-Reference

REF-A

Lewis and Clark County on the Scout map

See this county in spatial context. Compare with neighbors. Tune the composite weights to your priorities.

REF-B

Top counties in Montana

State rollup ranking the highest- and lowest-scoring counties for resilience by composite Scout score.

§06

Citations

Full methodology ▸
  • FEMA-NRIFEMA National Risk Index, county composite hazard score
  • NOAA-TMPNOAA nClimDiv county temperature anomaly, 2020-2024 vs. 1901-2000 baseline
  • NOAA-PCPNOAA county precipitation normals, 1991-2020
  • IRS-MIGIRS county-to-county migration, tax year 2021-2022
  • CDC-SVICDC Social Vulnerability Index, 2022 release (RPL_THEMES)
  • USDA-RUCCUSDA Economic Research Service Rural-Urban Continuum Codes, 2023
  • NASA-PWRNASA POWER climatology, annual global horizontal irradiance (kWh/m²/day)
  • USDA-NASSUSDA NASS Census of Agriculture 2022, county cropland and total land area
  • USDA-SDMUSDA NRCS Soil Data Mart, average seasonal soil saturation depth (cm)
  • ACS-2022U.S. Census Bureau ACS 5-Year Estimates 2022, median home value and gross rent